There is a lot of information about gardening, but a little time and research will get you off to a great start. With these tips, hopefully, you can come out a little more informed so that you can refine your methods and become a great gardener.
Pay attention to how you lay sod. You will need to prepare your lawn soil before laying the sod. Remove the weeds, then break up the soil into fine tilth (the condition of tilled soil, especially in respect to suitability for sowing seeds).
Make sure your soil is flat and compacted and thoroughly moist. The optimum layout of sod rows is to stagger them with offset joints. Press the sod down firmly so that the surface is flat and even. If there are gaps remaining, fill them with a bit of soil. Water the sod for two weeks and then you can safely walk on it as it will have had time to properly root.
Gradually acclimate plants to temperature changes and conditions, if you want to avoid shocking them - put them outdoors in the sun for no more than two hours the first day; over a week, increase the time outside slowly; and after a week's time, the plants should be fine staying outside.
A certain amount of CO2 is necessary for plants to maximize their growth potential. When exposed to high levels of CO2, most types of plants have the best growing condition possible. An example of this is a greenhouse which can concentrate the levels of CO2.
That wasn't so hard, right? As with any topic, the body of knowledge surrounding gardening is vast. In many cases, all that's needed to make some sense of the whirlwind of information is a reference point from which to get started.